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Air Admittance Valves close by gravity and seal the vent terminal at zero differential pressure and under positive internal pressures. Valves are made with PVC or ABS, and feature a neoprene tension membrane. Available in several sizes and DFU capacities.

Access Panels And Wall Boxes Allow Air Circulation For Sure-Vent Air Venting Fittings While Ensuring Their Protection And Inconspicuousness.

Access Panels And Wall Boxes are made with high-impact polystyrene with a metal faceplate. Grille is attached directly to the box frame. Sure-Vent air admittance valves are sold separately. Choose from several sizes.